81d8bd4180835a1b3fe27e4b63a683d84d9110e782b3ed99c7bff46a1f160f07

General

Target

5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
Size

240KB
MD5

5cbd36d95b2329c02152112a957ce639
SHA1

91e92845b83e662e127af8b046c353c4b396335d
SHA256

81d8bd4180835a1b3fe27e4b63a683d84d9110e782b3ed99c7bff46a1f160f07
SHA512

45205ed34f2b074a1aaf2dea5e2e87eba490323e4ffccd035b73e3fa2fbf6934ce3d84267eaf70d626b082416476f0e0cc2a9ca79811b8a9f0a3c1b550309f66
SSDEEP

6144:qdNYeBb+Zbl8EhDKf100QRchpvhYt4tZrsle:6N2bw00QChpvSSYe

Score

8^/10

discovery evasion persistence trojan upx

Malware Config

Signatures

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\YSCTWV = "C:\\Windows\\SysWOW64\\crtdll8.exe"	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	crtdll8.exe

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000\Control Panel\International\Geo\Nation	crtdll8.exe

Executes dropped EXE 1 IoCs

pid	Process
648	crtdll8.exe

UPX packed file 6 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2416-1-0x0000000000660000-0x0000000000707000-memory.dmp	upx
behavioral2/memory/2416-5-0x0000000000660000-0x0000000000707000-memory.dmp	upx
behavioral2/memory/2416-6-0x0000000000660000-0x0000000000707000-memory.dmp	upx
behavioral2/memory/2416-4-0x0000000000660000-0x0000000000707000-memory.dmp	upx
behavioral2/memory/2416-28-0x0000000000660000-0x0000000000707000-memory.dmp	upx
behavioral2/memory/2416-29-0x0000000000660000-0x0000000000707000-memory.dmp	upx

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\crtdll8.exe	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
File opened for modification	C:\Windows\SysWOW64\crtdll8.exe	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
2516	ipconfig.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
648	crtdll8.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 648	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe	85
PID 2416 wrote to memory of 648	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe	85
PID 2416 wrote to memory of 648	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe	85
PID 2416 wrote to memory of 664	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe	87
PID 2416 wrote to memory of 664	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe	87
PID 2416 wrote to memory of 664	2416	5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe	87
PID 648 wrote to memory of 2516	648	crtdll8.exe	89
PID 648 wrote to memory of 2516	648	crtdll8.exe	89
PID 648 wrote to memory of 2516	648	crtdll8.exe	89

C:\Users\Admin\AppData\Local\Temp\5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe"
1⤵
- Adds policy Run key to start application
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Windows\SysWOW64\crtdll8.exe
  C:\Windows\SysWOW64\crtdll8.exe
  2⤵
  - Drops file in Drivers directory
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:648
- - C:\Windows\SysWOW64\ipconfig.exe
    "C:\Windows\system32\ipconfig.exe" /flushdns
    3⤵
    - Gathers network information
    PID:2516
- C:\Windows\SysWOW64\cmd.exe
  /c C:\Users\Admin\AppData\Local\Temp\~unins7906.bat "C:\Users\Admin\AppData\Local\Temp\5cbd36d95b2329c02152112a957ce639_JaffaCakes118.exe"
  2⤵
  PID:664

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

5

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~unins7906.bat

Filesize
49B

MD5
9e0a2f5ab30517809b95a1ff1dd98c53

SHA1
5c1eefdf10e67d1e9216e2e3f5e92352d583c9ce

SHA256
97ac9fee75a1f7b63b3115e9c4fb9dda80b1caba26d2fb51325670dee261fe32

SHA512
e959cc1fd48fb1cccf135a697924c775a3812bab211fc7f9b00c5a9d617261d84c5d6f7cb548774c1e8f46811b06ca39c5603d0e10cbcb7b805f9abbe49b9b42

Download Submit
C:\Users\Adminxplore.exe

Filesize
89B

MD5
2bd83f0dd1740fff26d071dcdd59af56

SHA1
221e9e64a79255053a9e4da65957a7bdd6bc045b

SHA256
70a676e21716581858de2753ea5eec8befe6741ed299216f65a13c3853805c05

SHA512
fe632b63b8b850cc83f0eb2a114de60693ec0dd8b62fe8f0938b42526557889f48357da0ca3bb06bed1ad68562280023a69b54d93cff8b7266bb8ebb63ac903c

Download Submit
C:\Windows\SysWOW64\crtdll8.exe

Filesize
87KB

MD5
72610775e643ccf7530a1407604ca53e

SHA1
707452c652005b9fcbcfe5b09088036c668bc613

SHA256
eb07df7b58e5e9dc41893c25ca24900fb550036adf6bf3b95ab8365ad9644102

SHA512
f50bd0161224570aa463fbba968701e5b4cf2196a0f6a295a7b2ac1516bdb14d971eea90118efcf2e238d75ea7048b5644421bd49226f600befa16789d45d2c5

Download Submit
memory/2416-0-0x0000000000440000-0x0000000000476000-memory.dmp

Filesize
216KB

Download
memory/2416-1-0x0000000000660000-0x0000000000707000-memory.dmp

Filesize
668KB

Download
memory/2416-5-0x0000000000660000-0x0000000000707000-memory.dmp

Filesize
668KB

Download
memory/2416-6-0x0000000000660000-0x0000000000707000-memory.dmp

Filesize
668KB

Download
memory/2416-4-0x0000000000660000-0x0000000000707000-memory.dmp

Filesize
668KB

Download
memory/2416-7-0x0000000000720000-0x0000000000721000-memory.dmp

Filesize
4KB

Download
memory/2416-28-0x0000000000660000-0x0000000000707000-memory.dmp

Filesize
668KB

Download
memory/2416-29-0x0000000000660000-0x0000000000707000-memory.dmp

Filesize
668KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads